because it's what guides us. it's what... it allows us the opportunity to govern ourselves. >> over a thousand left limbs in iraq and afghanistan. but congressman rehberg voted against additional critical funding for prosthetic... >> jon tester votes to raise taxes... >> ryssdal: it's not hard to find political free speech in montana today. you see it all the time in what seems to be an endless run of political attack ads. >> and voted to raise the debt limit six times. >> ryssdal: the amount of money being spent is amazing. >> it could be $20 million on broadcast television. how do you like them apples? in the state of montana. >> ryssdal: so long as i know where the apples are coming from, i'm all right. that's the question. i don't know where the apples are coming from. >> right. we don't know where the apples are coming from and that's the problem here. >> ryssdal: david parker is a professor at montana state university. he's been tracking the tv ad spending in this senate race. >> it is incredibly difficult